deGrom felt normal on his way to the ballpark and planned on doing his usual routine to prepare for Monday's start. Getting sent to the DL came as a surprise.

The Mets decided to play it safe with deGrom, who hyper-extended his throwing elbow in his last outing. deGrom will miss at least one start, despite having a pain-free bullpen session on Saturday.

P.J. Conlon was called up from Class AAA Las Vegas and will make his major league debut when he starts on Monday night in Cincinnati. Conlon has gone 1-2 with a 6.75 ERA in five starts for the 51s this year.

"[deGrom] is experiencing nothing at all," manager Mickey Callaway said. "Jacob wanted to go out there and pitch tomorrow. Obviously with the competitor he is, he wanted to go out there and pitch for his team and the fans. But we as an organization have a responsibility to the fans, to our team and to everybody in New York to put ourselves in the best position to have a great season."

"The more and more we thought about it, it just wasn't worth the risk. Even if there's no risk or minimal risk at this point, it's tough to do that. We just wanted to see him throw one more time, get up and down and make sure that he's going to be totally fine."

The tentative plan is for deGrom to make about 50 pitches in a bullpen session on Tuesday, throw again on Friday and start next Sunday versus Philadelphia. deGrom has easily been the Mets' top starter this season with a 3-0 record and 1.87 ERA over seven games.

"I felt like I could go," deGrom said. "But I think, the bigger picture is what we're looking at. You go out there and something happens and end up missing five starts instead of missing one. We want to make sure everything is fine."

Briefs

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All the news about the New Jersey Devils, from training camp to the regular season and Stanley Cup playoffs.

Righty Anthony Swarzak (strained left oblique) played catch on Saturday with no issues. Swarzak made only two appearances this season before being placed on the DL on April 1. ...Callaway said catcher Kevin Plawecki (hand fracture) is still trying to build up more hand strength before resuming all baseball activities and swinging a bat. ...Cincinnati's Homer Bailey (0-4, 4.81 ERA) is expected to start on Monday against the Mets.